package com.xinxi11.project.qx.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * EncodingFilter
 */
public class EncodingFilter implements Filter {

	protected Logger log = LoggerFactory.getLogger(getClass());

	private String encoding = "UTF-8";

	public void init(FilterConfig filterConfig) throws ServletException {
		String encoding = filterConfig.getInitParameter("encoding");
		if (encoding != null && !"".equals(encoding.trim()))
			this.encoding = encoding.trim();
		log.info("Request character encoding is set to " + this.encoding);
	}

	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
			throws IOException, ServletException {
		request.setCharacterEncoding(encoding);
		chain.doFilter(request, response);
	}

	public void destroy() {
		log.info("EncodingFilter destroyed.");
	}

}
